Laboratory flask holder



FIG. 1 is a side elevation view of a laboratory flask holder showing my new design in assembled condition with a typical laboratory flask, shown in broken lines, being supported therein.

FIG. 2 is a top view thereof.

FIG. 3 is a bottom view thereof.

FIG. 4 is a cross sectional view taken along line IV--IV of FIG. 1. 

The ornamental design for a laboratory flask holder, as shown and described. 